Ovulation tests, including the Glow Ovulation Test, detect luteinizing hormone (LH) surges, which typically signal impending ovulation. However, if you have PCOS, your hormone levels may fluctuate more frequently, sometimes causing false positives on ovulation tests or making the results harder to interpret. For those with PCOS, ovulation tests can still be useful, but results may not always reflect true ovulation. Tracking additional signs, like basal body temperature with a Glow Smart Basal Thermometer, or consulting your healthcare provider for personalized advice, may help you better understand your cycle.